1. 设置仓库,我的Settings里设置使用了公司的Nexus
<?xml version=”1.0″?>
<settings xmlns=”http://maven.apache.org/POM/4.0.0″ xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance”
xsi:schemaLocation=”http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd”>
<localRepository>D:\mavenrepo</localRepository>
<servers>
<server>
<id>snapshots</id>
<username>snapshots</username>
<password>xxx</password>
<filePermissions>664</filePermissions>
<directoryPermissions>775</directoryPermissions>
</server>
</servers>
<distributionManagement>
<repository>
<id>releases</id>
<name>xxx Nexus Releases</name>
<url>xxxx</url>
</repository>
<snapshotRepository>
<uniqueVersion>false</uniqueVersion>
<id>snapshots</id>
<name>xxx Nexus Snapshots</name>
<url>xxxxx</url>
</snapshotRepository>
</distributionManagement>
<profiles>
<profile>
<id>xxxNexus</id>
<repositories>
<repository>
<id>xxxNexus</id>
<url>xxx</url>
<releases>
<enabled>true</enabled>
<!– always , daily (default), interval:X (where X is an integer in minutes) or never. –>
<updatePolicy>daily</updatePolicy>
<checksumPolicy>warn</checksumPolicy>
</releases>
<snapshots>
<enabled>true</enabled>
<checksumPolicy>fail</checksumPolicy>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>xxxNexus</id>
<url>xxxx</url>
<releases>
<enabled>true</enabled>
<checksumPolicy>warn</checksumPolicy>
</releases>
<snapshots>
<enabled>true</enabled>
<checksumPolicy>fail</checksumPolicy>
</snapshots>
</pluginRepository>
</pluginRepositories>
</profile>
</profiles>
<activeProfiles>
<activeProfile>xxxNexus</activeProfile>
</activeProfiles>
</settings>
2.发现重复类,执行命令
mvn -U clean package -Plocal -Dmaven.test.skip=true enforcer:enforce -DcheckDeployRelease_skip=true
-Dmaven.test.skip=true: 如果命令包含了test phase，则忽略单元测试
enforcer:enforce: 查找重复类
-DcheckDeployRelease_skip: 不知道什么意思
执行命令后,输出如下:
可以发现 jcl-over-slf4j 与 commons-logging 包有重复类冲突
3. 在pom里查找重复类冲突的包并排除重复类冲突
由于在我的pom里并没有显式写入common-logging的dependency,所以我们需要查找那个jar包依赖了commons-logging,执行如下命令
mvn -U dependency:tree -Dverbose
发现如下片段
在这个叫qsso-client的库里依赖了commons-logging包,所以我们在pom里将其排除
3. 排除重复类
<dependency>
<groupId>com.xxx.security</groupId>
<artifactId>qsso-client</artifactId>
<version>${qsso-client.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
这样就将qsso-client的commons-logging包排除了,之后再运行enforcer:enforce则不会再报错
